header{
	width: 100%;
	height: 1.44rem;
	background: #ffd600;
	display: flex;
	text-align: center;
	position: fixed;
	top: 0;
	z-index: 999;

}
header div:nth-of-type(1){
	flex-grow:1;
}
header div:nth-of-type(2){
	flex-grow:8;
	font-size: 0.28rem;
	line-height: 1.44rem;
}
header div:nth-of-type(3){
	flex-grow:1;
}
header img{
	width: 0.74rem;
	margin-top: 0.07rem;
}

header span{
	display: block;
}